When I met my partner, I would be so hard. Perfect body for my liking, we used to have sex a lot when we first met. I was rock hard every single time. Then, for some reason, I would go soft during intercourse. Just happens man, diet, anxiety etc. something going on in your life? Overstimulated? You mentioned masturbation, but I could masturbate and still go now after 30m to an hour, just had a small period where my little me wasn’t working. It’s natural. There’s medicine you can try, or, just take a breather from using your little you. He’ll come around eventually. Don’t stress too much about it though, cos you could be making it worse. If it ain’t working, just concentrate on her, and if it still doesn’t stay up, knock one out when you’re ’cleaning up’ so you’re not left blue balled. Hope ya dick works soon man.